The climate in Chinch'ŏn during September can be summarized as warm and wet.
September is in the fall / autumn in Chinch'ŏn and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 25°C (78°F), whilst at night 14°C (57°F) is normal.
| Daytime temperature | 25.3°C 77.5°F |
|---|---|
| Nightly temperature | 14.1°C 57.4°F |
| Average temperature | 19.7°C 67.5°F |
| Daily sunshine | 7.4 hrs |
| Avg rainfall | 142 mm 5.6 ins |
| Rainy days | 8 days |
| Sea temperature | 23.5°C 74.4°F |
| Humidity | 79% |
| Windspeed | 4.3kph 3 mph |
On average September is the 4th wettest month of the year in Chinch'ŏn with around 142mm 5.6 inches of rain making it a wet time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 7.4 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Chinch'ŏn in September 2025.
Best places to visit in September
| Hottest month: | August | 29.4°C 84.9°F |
|---|---|---|
| Driest month: | December | 26mm 1ins |
| Sunniest month: | October | 7.5hrs |
| Coldest month: | January | 0.7°C 33.3°F |
| Wettest month: | July | 308mm 12.1ins |